Saeety-bazob blade



A. H. BRYANT.

SAFETY RAZOR BLADE.

APPLICATION FILED NOV. 2s. 1.918.

1,309,456, Patented July 8, 1919.

INVENTOR [A A TTURNEYS AUGUSTUS HAGER BRYANT, F GLEN RIDGE, N El/V JSAFETY-RAZOR BLADE.

Specification of Letters fatent.

Patented July 8, 1919.

Application filed November 26, 1918. Serial No. 264,180.

To all whom it may concern:

Be it known that I, AUoUsTUs H. BRYANT,

a citizen of thmUnited States, and a resi-- dent of Glen Ridge, in thecounty of Essex and State of New Jersey, have invented a new andImproved Safety-Razor Blade, of

.-which the following is a full, clear, and

exact description. 7

This invention relates to safety razor blades and has for an object theprovision of an improved construction wherein a very high grade blademay be produced having overhanging shoulders.

Another object in view is to provide a safety razor blade of high gradematerial with a back mounted thereon formed with an extension"projecting beyond each end so as to roduce shoulders for the blade.

11 the accompanying drawing: Figure 1 is a front View of abladedisclosing an embodiment of the invention.

Fig. 2 is an edge view on an enlarged scale offthe blade shown inFig. 1. Fig. 3 is a section through Fig. 1 on line 33, the same being onan enlarged scale.

-Fig. 4 is a view similar to Fig. 1, but showing an old construction.

In the construction of safety razor blades some are made with aperturesfor receiving uiding pins which hold them in place while t e clamp isbeing adjusted. In other forms of safety razors projections are providedas shown in the old blade indicated as 1 in the drawing. This blade isprovided with projections or ears 2 and 3 formed integral with theblade 1. Itwill be observed that the blade 1 is ground with an irregularedge '4 and is honed with an additional irregular cut 5. The reason ofthis irregular sharpening is by reason of'the fact that the blade isnecessarily sharpened by hand manually and it is physically impossiblefor the open ator to hold the blade perfectly true against the grindingor honing device. This form of blade is stamped out of a ribbon of softsteel, is then hardened and finally ground and honed. It is necessary toform these blades from the soft material in order to secure the rightshape by stamping them out bythe use of dies so that it is necessary totemper the blades either individually or in packs. In either instancethe blade will be more or less unevenly tempered, and'also some bladeswill be hardened to a greater extent than others. In addition the bladesbeing necessarily cut out while soft and then passe hardened, thesharpening operations are time. These, manual operations during thesharpening actions cause the irregular or uneven sharpening cuts 4 and5. To obviate this more or less undesirable feature of manually grindingthe blade and the undesirable feature of the particular way in which theblade is tempered anew structure CZLII'lBd on manually with one blade ata is provided according to the present inven- 'tion in which a blade 6is used. This blade is formed from a ribbon of uniformly high temperedsteel, and a steel hardened to a greater extent than blade 1 whereby theedge 7 will remain sharp for a greater length of time. Before breakingthe ribbon into (proper blade lengths the ribbon is through an automaticmachine which grinds an even bevel and true edge for the entire lengthof the ribbon, this furnishing V a proper base for the finishing orstropping device which provides a very even, smooth and uniformly finecuttin edge. The ribbon is then placed in a reaking machine and brokenoff into lengths after which-the back 8 is pressed thereon by anydesired means, as for instance a hydraulic press. This back ti htlygrips the back edge of the blade 6 so t at it. cannot be removed underordinary circumstances. A back arranged in this manner not only affordsstiffening means for the blade, which is extremely thin, and shouldersfor holding the blade properly in position in the holder, but acts byreason of its thickness as means for guiding the blade groperly throughhoning and stropping mac ines. If it was attempted to feed thin bladeswithout backs throu h either of these machines the blades wou d overlapand jam, and by providing a back which is ap reciably thicker than theblade the various blades may be lined up tandem fashion and passedthrough the grinding and honing machine in such a manner as to beproperly acted upon. The back is referably perfectly straight so as tohol the cutting edge at the exact height to be properly operated on bythe honing and also by the stropping machine while the thickness of theback causes the rear blades to easily push the front blades and in thatmanner cause a continuous string to pass through the two machines justmentioned. In addition to forming a back for the blade 6 it is madesulliciently long to provide shoulders 9 and 10, said shoulders ifdesired being blade a very g grade rounded on the outer ends forproducing a -projections 2 and 3 when the blade is in use-namely: asretaining members coacting with the holder. lln the particular form ofholder adapted for blades with extending shoulders upstandinglugs or.stops are provided so as to engage the shoulder and limit the movementof the blade toward the guarding lingers, whereby the edge is always inthe right position when the shoulders en-' gagethe stop.

By this method of forming a safety razor of steel may be used as Well asa very hard product. addition the edge 7 is produced by a grindingmachine acting on the entire length of the ribbon of steel instead. ofthe manual grinding necessary in the structure shown in Fig.4,Preferably the blade 6 is also made thinner than blade 1 as is suppliedwith a stifl'ening back 8. The extensions or shoulders 9 and 10 actexactly in the same capacity as extensions or ears 2 and 3 so that theaddition of the back 8 really accomplishes two purposes, namely presentsa stifi'ening structure and presents shoulders acting as a substitutefor the integral shoulesa ass ders 2 and. During the act of pressing theback 8 in position on the blade 6 the ends 9 and 10 are pressed togetheras showr'i in Fig. 2 soas to make a neat construction and \also act asan additional pinching means for the blade. This will also positivelyprevent any longitudinal movement of the blade in case it should becomeloose which is substantially impossible though the back is put on cold.

What 1 claim is: y Y

l. A razor blade comprising a blade structure having one sharpened edge,a back substantially Ushaped in cross-section clamped to the oppositeedge of said lolade structure, said back projecting beyond the ends ofthe blade structure, said proiecting portions being; pressed together.

. 2. A razor blade comprising a rectangular shaped blade body formed ofvery hard stili steel sharpened along one of its longitudinal edges, anda back thicker than the blade formed with a suhstant iiy til-shapedstraddling portion clamped to the opposite edge,

and with projceting shoulders extending beyond the ends ior ducingretaining means when the blade is iii a holder AUGUtSTU

